package com.gtt.lazy.service;

import com.gtt.lazy.domain.User;

/**
 * 用户管理服务
 * 
 * @author 高甜甜
 * @date 2009-7-10
 */
public interface UserService {

	int add(User user);

	void update(User user);

	boolean exist(User user);

	User get(int id);

	boolean existUser(String username);

	User findByUsername(String username);
}
